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Finding the Fourth Proportional to 123,356.34, 170,235.08 and 74,941.79

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Solution

The fourth proportional to 123,356.34, 170,235.08 and 74,941.79 is: 103,421.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,356.34 : 170,235.08 = 74,941.79 : x
  2. Step 2: Convert to fraction form
    123,356.34/170,235.08 = 74,941.79/x
  3. Step 3: Cross multiply
    123,356.34x = 170,235.08 × 74,941.79
  4. Step 4: Simplify right side
    123,356.34x = 12,757,720,390.11
  5. Step 5: Solve for x
    x = 12,757,720,390.11/123,356.34
  6. Step 6: Final answer
    x = 103,421.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.